Originally Posted by
Stazi
You canÂ’t directly compare it to a car as the load on the car is not constant, like it is on a boat. You cannot coast in a boat there is always load on the engine when moving forward. Think of it more like Top Speed in a car. So depending on what gear you are in you will reach a different top speed. In a boat the pitch of the prop dictates how much the engine can rev depending on the load on the engine which is directly related to the pitch of the prop.
If you had a prop with no pitch so it was basically a disk, the engine would rip all the way to redline and bounce off the rev limiter, but you wouldn’t move. Now think about it if you had a prop with a pitch that was let’s say 45°, so it’s pretty aggressive. The power of the engine can only turn the prop so fast and it will not reach redline as it will never be able to generate enough power to get there.
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